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Zhejiang Jiayue Machinery Manufacturing Co.,Ltd
Add:No.7 Changxin Road, Yancang Subdisctrict, Dinghai, Zhoushan, Zhejiang, China
Mobile: +86-15958098091(Wechat, WhatsApp)

Contact Person: Jade Le

Single Screw and Barrel for Injection Moulding Machine

Single Screw and barrel for Injection Moulding Machine Product Parameter Product Features Single Screw and barrel for Injection Moulding Machine Screw Production Process Barrel Production Process Application Area Applications in Plastic Products Applications in Plastic Machinery Single Screw and...

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Product Details

China Single Screw And Barrel For Injection Moulding Machine


Product Parameter

Single Screw and barrel for Injection  Moulding Machine


Heat treatment and High frequency quenching

Screw diameter Range


Max. Barrel Inner Bore Diameter


Nitride case depth

0.45 - 0.7mm

Screw bimetallic depth


Application Machines

Injection Molding Machine Such As: Haitian/Haida/Jsw/Nessei/Toshiba/Battenfeld/Engel/Yizhimi

Product Features

Single Screw and barrel for Injection Moulding Machine


Single Screw And Barrel For Injection Moulding Machine 

Application in  Products

plastic product

Single Screw and barrel for Injection Moulding Machine

The screw of the injection molding machine plays a decisive role in the plasticizing quality. It has functions of conveying, melting, mixing, compressing, metering and exhausting, and is a key factor affecting the quality of plasticization. So how to choose the screw that meets the standard is especially important. Below, we will provide you with several important parameters for your reference.

Method / step

1 Note that the screw diameter (D) is related to the required injection volume: injection volume = 1/4 * π * D2 * S (injection stroke) * 0.85, which is inversely proportional to the highest injection pressure and proportional to the plasticizing ability. The screw is responsible for the transportation, pushing and preheating of the plastic. It should be preheated to the melting point. The crystalline plastic should be long (such as POM, PA), the amorphous material (such as PS, PU, ABS), and the heat sensitive is the shortest (such as PVC).

2 The screw of the injection molding machine is responsible for the mixing, compression and pressurization of the plastic. The raw materials in this section are almost completely melted, but they are not necessarily uniformly mixed. The plastic gradually melts, and the volume of the screw groove must be correspondingly decreased to correspond to the decrease of the geometric volume of the plastic. Otherwise, the material pressure is not real, the heat transfer is slow, and the exhaust gas is poor. The compression section generally accounts for more than 25% of the screw working length, but the nylon screw accounts for about 15% of this section. The plastic screw with high viscosity, fire resistance, low conductivity and high additive accounts for about 40%, and the PVC screw can account for 100%. In order to avoid intense shear heat. The length of the metering section is good, and the mixing effect is good. If it is too long, the melt will stay too long and cause thermal decomposition. If it is too short, the temperature will be uneven, generally accounting for about 20%, ensuring that the plastic is completely melted and the temperature is uniform. Uniform, PVC and other heat-sensitive plastics should not stay too long, so as to avoid thermal decomposition, a shorter metering section can be used.

3 The deeper the depth of the feed groove, the larger the delivery volume, but the screw strength of the injection molding machine should be considered. The shallower the depth of the metering groove, the plasticizing heat and the higher the mixing performance index, but the metering groove depth is too shallow. The heat cut increases, the self-generated heat increases, and the temperature rise is too high, causing discoloration or charring of the plastic, especially for heat sensitive plastics. It can be said that the screw is the heart of the injection molding machine, and the quality of the screw determines the quality of the product.


Q: How about your screw barrel quality compared to Machine suppliers?
A:  In fact, we have many machine supplliers and agents buying screw barrel from us, the quality and price are both competitive .
Q: How about the warranty guarantee 

A: For 100% new material, one year under normal operation.

Q: How about the MOQ of screw and barrel ?

A: One set. 

Hot Tags: single screw and barrel for injection moulding machine, China, suppliers, factory, customized, in stock, made in China


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